Scavenger roll mechanism



Jan. 2, 1945.

W. MILNARIK ETAL SCAVENGER ROLL MECHANISM Filed Dec. 31, 1943 i4 INVENTORS 315 36' a Q 5; l/V/L LIAM M/L/VAR/K 4 34 2 AND l/Ol/N BRADJHA w BY. m

'A TTORNE X 1 Patented Jan. 2, 1945 SCAVEN GER ROLL MECHANISM 'William Milnarik and John Bradshaw, Yonkers, N. Y., assignors to Alexander Smith & Sons Carpet Company, Yonkers, N; Y., a corporation of New York Application December 31, 1943, Serial No. 516,346

5 Claims.

This invention relates to machines for spinnin textile fibers such as cotton or wool. More particularly, it relates to a spinning frame provided with a new and novel scavenger roll mechanism.

In the usual type of frames for spinning cotton and wool, there is provided a plurality of spinning positions and in each position a yarn end is fed by a pair of yarn-delivery rollers to a rotating twisting head to impart a fals twist to the yarn, and thence to drawing rolls from which the yarn is passed through a yarn guide in a guide board to the spinning ring and wound on a bobbin. The corresponding drawing rolls in each position are mounted on a driven shaft extending lengthwise of the frame. The aforementioned frame is also provided with a driven shaft extending lengthwise thereof and positioned beneath the drawing rolls. This shaft, known as the scavenger roll shaft, is provided with a series of scavenger rolls spaced to correspond to each spinning position, the front portion of the periphery of each scavenger roll being positioned closely adjacent to the path of travel of the yarn from the drawing rolls to the guide,

whereby when a yarn end is broken the loose yarn engages the adjacent scavenger roll and is wound thereon, thus preventing the yarn from becoming entangled with adjacent yarn andcausing breakage of additional yarn ends. The aforemen tioned scavenger roll shaft is continuously driven during operation of the frame through appropriate means from one of the drawing roll shafts. The aforementioned spinning rolls and scaven-ger roll mechanisms are fully shown and described in United States Patents Nos. 1,774,372, 1,973,534 and 2,024,447.

During operation of spinning frames provided with the aforementioned prior art scavenger roll mechanism, when a yarn end is broken, the loose end or roving engages the adjacent scavenger roll and is wound up thereon. After the operator has spliced the yarn so that it again can be twisted and wound on the bobbin, the waste which has accumulated on the scavenger roll is removed. This is accomplished either by severing the windings, usually with a knife, while on the scavenger roll or by sliding the accumulated waste from the scavenger roll onto the rotating scavenger roll shaft and then cutting the waste so as to remove it from'the shaft. Since either of these operations to remove the waste accumulated on the scavenger roll is performed with the aid of a knife, frequent accidents to the operators occur, especially sincethe removal of the waste must be accomplished. while the. scavenger roll or the scavenger roll shaft is rotating. The use of the knife on th scavenger roll also mutilates said roll. When a knife is not used, the operator slides the accumulated waste onto the scavenger roll shaft and pulls it to break it for removal. In any event, the removal of the waste by any of the aforementioned procedures requires acertain amount of time, which interferes with production. When a number of breaks occur at different spinning positions, it becomes necessary to stop the operation of the machine until the broken ends are spliced.

An object of this invention is to provide a scavenger roll mechanism whereby the operator may quickly remove the accumulated waste from the scavenger roll.

A further object of this invention is to provide a scavenger roll mechanism whereby the waste which has accumulated thereoncan be removed without the severance thereof.

A still further object of this invention is to provide a scavenger roll mechanism whereby the waste which has accumulated thereon can be effectively removed by sliding the waste therefrom.

Other and additional objects will become apparent from the following description.

The objects, in general, are accomplished by providing a scavenger roll arrangement wherein each scavenger roll is mounted at one end and the other end is free. As will become apparent from the following detailed description, in the preferred form of the invention there is provided a stub shaft which is so mounted that the ends thereof are unsupported and a scavenger roll is secured to eachend thereof with one end of the scavenger roll free. The stub shaft is of such length that one of the scavenger rolls carried thereby will be disposed adjacent the path of travel of the yarn from the drawing rolls in one spinning position to catch a broken endof yarn and the other of said scavenger rolls Will be similarly disposed to the path of travel of the yarn from the drawing rolls of the next spinning position. A plurality of such stub shafts and scavenger rolls are positioned lengthwise of the frame. Each stub shaft is carried intermediate its ends by a bracket. A rotatably mounted shaft extending lengthwise of the frame is rotatably supported by the brackets. The rotary motion of the shaft is transmitted to each stub shaft by means of a belt cooperating with pulleys carried by the rotating shaft and each stub shaft reshown) to a twisting head 16 where afalse twist.

is introduced in the yarn. The twisting head It is carried by a bracket 20; suitably mounted in the frame and is rotated bya belt. [8 driven in the usual manner by means, not shown. Since the details of construction of the twisting head It are known and form no part of this invention, further description thereof is unnecessary.

The yarn I l passes from the twisting head IE to the drawing rolls 2-2 and 24, which are preferably fluted. A presser roll 26 cooperates with the drawing rolls 22 and 2 4. The rolls 2'2, 24 and 2 6 are preferably weighted; Since the details ofconstruction ofthe weighting mechanism are well known, furtherdescriptionthereof is deemed unnecessary; From the drawing rolls, the. yarn ll passes through a guide 3!! of a guide board 32, carried on the frame at 34 and hinged at 36 to a spinning ring 41), and wound on bobbins: 42. The drawing rol-ls 22- aremounted on a shaft 4'4; which extends lengthwise of the machine and is driven from a suitable source of power (not shown). The rotary movement of the shaft 44 is" transmitted to a shaft 46, which also'extends lengthwise of the machine andcarries the drawing'rolls 24, by'means or a gear 48 on the shaft 44', an idler gear 50 appropriately mounted inthe frame anda gear 52 carried on the shaft. The aforementioned description of the spinning frame are details of construction of a standard wool -spi-nning frame.

The scavenger roll mechanism which constitutes the instant invention will nowbe described.

As shown in Figure 1 Off the drawing, there is provided a: plurality of stub shafts 60; each of which; is rotatablymounted intermediate its ends i-n-the arms-62 of" a bifurcated bracket 64*, there beingone bracket for each' stub shaft. Each bracket is; secured: to the, frame; of" the machine by bolts 66 and disposes the stubshaftcarried thereby; beneath the drawingrolls andabove the guide 30. Qn each unsupported end of each stubshaft 650; there is rigidly secured a scavenger roll 68, and; as shown in, Figure 3; the outside end ofeach scavenger roll is free. Each stub shaft, 6 0 is of suchlength that one of the scavenger rollsSQ carried thereby Willbe disposed adjacent the path of travel of the yarn from the drawing rolls, in one spinning position so that when the yarn or roving breaks itwill' be engaged and wound up on said scavenger roll and the other scavenger roll carried: thereby'will; be simi- Each scavenger roll 68 is tapered toward the free end thereof so that the waste accumulated thereon may be efficiently and effectively removed by merely sliding or rolling it toward and ofi the smaller free end. Due to the manner of mounting the scavenger rolls, the waste, after being. rolled or slid over the free. end, is completely removed from the spinning frame without any additional operation. Though it is preferred that the stub shaft does not project from the free end of the scavenger roll, nevertheless it may project slightly if it does not interfere with the removal of the waste. .Each scavenger roll 68 is also provided with a felt covering whereby it will. more efliectively engage any broken yarn.

' usual operation, after the broken end has been spliced and spinning" at that position resumed, the operator rolls or slides the waste which has accumulated on thescavenger roll toward the free end thereof. This rolling or sliding operation is continued until the waste is' free of the scavenger roll. Itwill be notedthat the sliding or rolling of" the waste removesit: from the scavengerroll' without any other operation. There is no need for severing the waste on the scavenger roll or at time; There is no shaft on which the waste is removed: from the scavenger roll and from which, it must be subsequently removed. The operation is quicklyand effectively accomplished with no danger of injury to the operator.

The instantscavenger roll arrangement isrelatively cheap and may be applied to spinning machines off varioustypes; Itprovides; an effective mechanism for quickly removing the waste which has accumulated on a; scavengerroll with a minimum danger of injury to the operator. The. removal; of hewastefrom, the scav e 1 by the opera o can beperformediin avery short interval. of time, with. the, result, that the work l d on, the op ra or i reduc Further, cause of, the quick removal of the. waste by, the opera-tor, when. a, number of breaks occur atdife f rent spinning positions,. the. operation, of the frameneed not be: stopped, in order. to, quickly remove the waste. nor to make the necessary splices and remove the waste.

Since it; is; obvious! that many changes and mod fica ions an. e. ma in the. abovedescri ed details. without, departing from the natureand spirit; oh the: intention it: is to be; understood" that the inventiongis; not; to be: limit d thereto; except asset forthiin the: app nded claims:

We claim:

1-. In a yarnw-spinning frame; having: a.v plusra-lity of: spaced: spinning positions. and wherein each. spinning position includesl 3156b: of? drawin rolls; atrotatable stub; shaft; having: at. least one end thereof unsupported and? disposed beneath thedrawing rolls; a: scavenger. roll: on the unsupported end of. said stub: shaft whereby said scavenger roll, will: be; disposed beneath said drawing rolls. in; position: to catch astbrokenz end ofiyarn, and: means to continuously. rotate said stub. shaft: during operation: off the. frame;

F "2. 'In a. yank-spinning; frame having: 37 plus rality of spaced spinning positions and wherein each spinning position includes a set of drawing rolls, a stub shaft beneath the drawing rolls,

means rotatably supporting said stub shaft in-' termediate the ends'thereof whereby the ends of said stub shaft are unsupported, a scavenger roll secured on each end of said stub shaft, said stub shaft being of a length to disposed one of said scavenger rolls adjacent the path of travel of the yarn from the drawing rolls in one spinning position to catch a broken end of the yarn and the other of said scavenger rolls similarly to the path of travel of the yarn from the drawing rolls of the next spinning position, and means to continuously rotate said stub shaft during operation of the frame.

3. In a yarn-spinning frame having a plurality of spaced spinning positions and wherein each spinning position includes a set of drawing rolls, a bracket on said frame, a stub shaft rotatably mounted intermediate the ends thereof in said bracket whereby the ends of said stub shaft are unsupported, said bracket disposing said stub shaft beneath the drawing rolls, a scavenger roll secured on each end of said stub shaft, said stub shaft being of a length to dispose one of said scavenger rolls adjacent the path of travel of the yarn from the drawin rolls in one spinning position to catch a broken end of the yarn and the other of said scavenger rolls similarly to the path of travel of the yarn from the drawing rolls of the next spinning position, a shaft extending lengthwise of the frame, means to continuously rotate said shaft during operation of the frame, and means to drive said stub shaft from said shaft.

4. In a yarn-spinning frame having a plurality of spaced spinning positions and wherein each spinning position includes a set of drawing rolls, a plurality of spaced brackets on said frame, a stub shaft rotatably mounted intermediate its ends in'each of said brackets whereby the ends of said stub shaft are unsupported, each of said brackets disposing the stub shaft carried thereby beneath the drawing rolls, a scavenger roll secured on each end of each of said stub shafts, each stub shaft being of a length to dispose one of said scavenger rolls adjacent the path of travel of the yarn from the drawing rolls in one spinning position to catch a broken end of the yarn and th other of said scavenger rolls similarly to the path of travel of the yarn from the drawing rolls of the next spinning position, a shaft extending lengthwise of the frame and rotatably mounted in said brackets, means to drive said shaft during operation of the frame, and means to drive said stub shafts from said shaft.

5. In a yarn-spinning frame having a pluralityof spaced spinning positions and wherein each spinning position includes a set of drawing rolls, a plurality of spaced brackets on said frame, a stub shaft rotatably mounted intermediate its ends in each of said brackets whereby the ends of said stub-shaft are unsupported, each of said brackets disposing the stub shaft carried thereby beneath the drawing rolls, a scavenger roll on each end of said stub shaft, said stub shaft being of a length to dispose one of said scavenger rolls adjacent the path of travel of the yarn WILLIAM MILNARIK. JOHN BRADSHAW. 

